package com.qk.filter;

import com.qk.utils.JwtUtils;
import jakarta.servlet.*;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
@Slf4j
//@WebFilter(urlPatterns = "/*")
public class TokenFilter implements  Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //1.获取请求路径
        String uri = request.getRequestURI();
        //2.判断请求路径是否为登录路径
        if(uri.contains("/login")){
            filterChain.doFilter(request,response);
            return;
        }
        //3.判断token是否存在
        String jwt = request.getHeader("token");
        if(jwt == null || jwt.equals("")){
            log.info("请求头token不存在");
            response.setStatus(401);
            return;
        }
        //4.如果token不存在，返回未授权
        try {
            JwtUtils.parseToken(jwt);
        } catch (Exception e){
            log.info("令牌解析失败");
            response.setStatus(401);
            return;
        }
        //5.放行
        filterChain.doFilter(request,response);
    }
}
